General information about solar power is found in the following references [Duffie and Beckman, 1991] [Markvart, 2000]. The sun radiates energy radially, from an effective surface temperature of about 5760 K, as electromagnetic radiation known as `solar energy' or sunshine. The earth is situated at about 150 million km from the sun with a total surface area of about 510 million km2, of which only about 21% is land. A substantial portion of the solar radiation, on its way to reaching the earth’s surface, is attenuated due to atmospheric interventions. However, the intermittent nature of wind makes power system operation especially challenging. Rapid and flexible control of other generators is required to balance wind power generation with demand. In addition, the best wind resources are often found in rural areas far from existing high- capacity transmission lines.